I just noticed they've been doing Njáls saga on the Icelandic radio station, Rás 1. The recording is from 1972. It's read by Einar Ólafur Sveinsson. Unless anyone else noticed, we've missed most of it. The most recent episode available today is from 6th July, the burning itself.
http://dagskra.ruv.is/ras1/4579024/2011/07/06/
Kvöldsagan: Njáls saga
Einar Ólafur Sveinsson les.
(Hljóðritun frá 1972).